Classical Radiation of Long-Wavelength Photons
In the description of scattering processes involving charged particles electric currents are conveniently introduced and since such currents are surrounded by electromagnetic fields it is necessary to include also the effect of a certain number of photons accompanying the process. This purely classical phenomenon may of course be treated by classical means with the advantage of avoiding the difficulties inherent in the perturbation expansion of QED for low-energy photons. In the classical treatment no distinction is made between real and virtual photons; exactly this unphysical splitting causes the quantum-electrodynamical description to fail for long-wavelength photons.
KeywordsRadiative Correction Virtual Photon Perturbation Expansion Soft Photon Recoil Proton
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